The Rotary N2178-1 lift arm component is the direct replacement for the Rotary lift it came off of. Cross-referenced as ALS-7545-26, it is the genuine Rotary part — same part number, same fit, and same working specification as the one already on your lift. Ordering the Rotary lift arm component from us gets you the OEM piece that matches the lift, not an aftermarket knock-off that is close but not the same.
Specifications
- Part number: ALS-7545-26
- Brand: Rotary
- Type: Genuine OEM lift arm component
- Fits: SPOA10, SPOA10 EH-1, SPOA10 EH-2
- Lift type: 2-post lift
The restraint gear on a 2-post lift is the toothed gear that engages when the lifting arm swings in under load, locking the arm at whatever angle the tech set it to. When teeth wear round, chip, or the pawl gear that engages into the restraint gear loses its point, the arm can swing under load — and a swung arm with a vehicle on it drops the vehicle. Any restraint gear that will not positively catch the arm under light hand pressure needs to come off, whether the teeth look okay or not.
Related parts for this lift
The parts below are commonly ordered alongside this one — cables, sheaves, seals, and hardware wear on similar schedules, and most repairs go faster when the whole set is done in one visit.
- Arm Restraint Engage Gear - Rotary N2121
- Outer Rear Swing Arm - Rotary N2150-1
- Inner Rear Swing Arm Kit - Rotary N2103-1
- Arm Swivel Pin - Rotary N2154
- Arm Restraint Gear (Adjustable) - Rotary SVI Exclusive
- Arm Restraint Gear (Not Adjustable) - Rotary N2122
Check your lift's serial before ordering
The most common reason a lift part comes back is not a defect — it is a revision mismatch. Manufacturers change sub-parts between production runs while keeping the same lift model name, so "it fits my lift model" is not always enough. The model plate carries the serial number that pins your lift to a specific run, and that is the number that settles which version of this part belongs on your lift.
Can't find the plate? Measure the old part — overall length, bolt-hole spacing, thread size on anything threaded — and photograph it from a couple of angles. Send that with your lift's brand and rough age and we will match it against the parts breakdowns we service from every week.
Also inspect
- Arm pin — if you had a bad restraint gear you may also have a mushroomed or grooved arm pin
- Foot-pad rubber — intact, securely attached
- Return spring on the pawl
- Arm itself — broken welds, cracks, severe rust
A restraint gear that will not engage is a lift that is unsafe to load. Do not put a vehicle on the lift until you confirm both arms lock positively under hand pressure.
Why buy your Rotary lift arm component from Auto Lift Services
We install, inspect, and repair Rotary lifts every week — the ALS-7545-26 is a part we handle in the shop, not a random SKU we drop-ship.
- The phone answers if you have a question mid-install — call 800-674-9302.
- We confirm the right part for your lift's serial and production year before you order.
- Every part ships as genuine Rotary — no aftermarket substitution unless you specifically ask for an aftermarket equivalent.
If you also need companion wear items — cables, sheaves, seals, hardware — for the same repair, use our parts lookup and we will build the whole kit for your lift so you order once and finish the job.
About this n2178 inner front
The n2178 inner front is a direct-fit replacement engineered to restore original manufacturer performance on the lift model it services. Every piece we ship carries the exact dimensional and material specifications the OEM published for that application. Fitment on this component is critical: it interfaces with adjacent hardware in ways that any deviation from spec can drive premature wear on nearby parts or trigger the lift's mechanical safety systems into an unexpected condition. Shops that source this from us instead of a generic aftermarket substitute consistently report zero fitment issues on first-time installation.
Technical specification & installation notes
Cycle life on this piece depends heavily on operating conditions. In a typical commercial repair shop running 6-10 lifts per day, the n2178 inner front should deliver five to eight years of service before showing measurable wear against the OEM inspection specification. In a high-volume tire or alignment shop running 20+ lifts per day per bay, expect service every three to five years. It is designed to be a serviceable component; when it does wear it wears within safe operating margins that trigger visible symptoms — drift, uneven wear, minor leakage — well before failure becomes a safety issue.
Shipping & ordering
Placing an order online is the fastest path — add to cart, check out, done. If the shop needs a purchase order, net-30 terms, or a formal quote for a fleet-service contract, our accounts team handles those via email at [email protected] or by phone at 800-674-9302. Volume pricing on the n2178 inner front kicks in at 10+ pieces on the same order for common wear items. Ask about the volume rate specifically before you check out — many fleet buyers stock 6-12 pieces at a time and the discount is meaningful over that shelf life.
Warranty coverage
Return policy on the n2178 inner front follows our store-wide standard: all parts sales are final; exchanges only if the piece arrives defective. In the case of a defective delivery, ship the failed piece back to us at your cost, we verify the defect on receipt, and ship a replacement at ours. Wrong-item deliveries where we made the shipping error follow a different path — we reimburse the return shipping cost and cover freight on the correct part. Contact [email protected] with the order number to start either process.
Cross-reference & fitment
Fitment on the n2178 inner front is verified against the lift serial number when the order comes in. Even inside one manufacturer's catalog, a lift model built in one production year can carry subtle revisions from the same model built two or three years later. Sending us the lift serial number when you place the order — either in the order notes or in a follow-up email — lets us verify the piece against that specific serial's parts list. That five-minute step catches revision mismatches before shipping and prevents the delay of an incorrect delivery.
Questions about the n2178 inner front? Call our parts desk at 800-674-9302 or email [email protected]. We ship nationwide from our Iowa warehouse and answer fitment questions within one business day.
Inner Front Swing Arm - Rotary N2178-1
Parts that fit your lift
This Rotary part fits the lift models below. Click your model to see every part that fits it — handy for grabbing the wear items that usually go at the same time (cables, sheaves, pins, locks).
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